Possible Duplicate:
How can I repair grub? (How to get Ubuntu back after installing Windows?)
My dual boot desktop was running only Windows 7 until it crashed on a windows update.
Couldn't get it started again even after all the usual things that might fix it, so I installed Ubuntu 12.04, which has worked very well.
unfortunately Carbonite doesn't run on Linux yet, and so I called Microsoft support to see if we could be Windows 7 up and running.
Their attempts to get Windows 7 running resulted in writing a new MBR for windows, which failed and also somehow caused the loss of ability to boot into Ubuntu also.
How can I get back to Ubuntu?
I don't want to lose my settings in Ubuntu.
